Question

resolva as seguintes equações do primeiro grau com a incógnita
A 8 x + 4 = 76
B 18 x = 12x + 24
C 10 x - 2 = 6x + 22
D 4x + 16 = x + 26​

Answer 1

A)

$8x + 4 = 76 \\ 8x = 76 - 4 \\ 8x = 72 \\ x = \frac{72}{8} \\ x = 9$

B)

$18x = 12x + 24 \\ 18x - 12x = 24 \\ 6x = 24 \\ x = \frac{24}{6} \\ x = 4$

C)

$10x - 2 = 6x + 22 \\ 10x - 6x = 22 + 2 \\ 4x = 24 \\ x = \frac{24}{4} \\ x = 6$

D)

$4x + 16 = x + 26 \\ 4x - x = 26 - 16 \\ 3x = 10 \\ x = \frac{10}{3}$